add missing import

Author: laurit

instrumentation/jaxws/jaxws-2.0-common-testing/src/main/java/io/opentelemetry/javaagent/instrumentation/jaxws/v2_0/AbstractJaxWs2Test.java

@@ -22,6 +22,7 @@
 import io.opentelemetry.test.hello_web_service.HelloRequest;
 import io.opentelemetry.test.hello_web_service.HelloResponse;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Locale;